The Park Tool hex wrench set will be the tool(s) you use more than any other on your tool board. The rounded head on one end of the hex allows you to approach the nut from multiple angles and the tool fits in your hand beautifully. If I were to recommend one improvement, it would be that the MM marking on each tool should be in black-on-blue (rather than blue-on-blue) so it can be seen from far away. For example, 5mm and 4mm should be in black. Otherwise, GREAT PRODUCT!
The wrenches are very handy for getting into tough locations. Good quality tools at a fair price. However, being a bit of an organizational neat freak, I have to say I was disappointed with the holder. The handle heads overlap one another in such a way that it can be clumsy to get to the right allen wrench. Moreover, with the larger wrenches sitting on the top tiers, it can be a little top heavy and prone to tip. Nevertheless, I would buy this set again.....but I sure wish they would find a new way to package it.